BIFUNCTIONAL CHELATING AGENTS

摘要

A bifunctional chelating agent of the formula (I): wherein the variables R1, R1 , Q1, Q2 and M are as defined in the description of the present application. Also described is a complex of the above chelating agent to an ion of a stable or radioactive metal; a conjugate of the complex covalently attached to a biological carrier; and a pharmaceutical composition containing the conjugate.